Abstract: Vehicle to grid（V2G） technology is a highly emerging technology in the energy Internet, which is widely studied for the rational use of renewable energy. However, due to the centralized management of V2G network and the openness of communication, V2G network has some problems, such as single point of failure, privacy disclosure, unbalanced scheduling of distributed energy and so on. To solve the above problems, a localized vehicle to vehicle（V2V） energy trading system model based on alliance blockchain is proposed. In addition, considering the price and power demand matching between electric vehicles, a new secondary double auction mechanism is proposed to match the transaction vehicle pairs and determine the final transaction price, and make the profits of both parties equal. The security analysis shows that the blockchain network improves the security of V2V energy transaction. Finally, the numerical results show that the proposed double auction mechanism improves the income of both parties and the income is equal, and improves the success rate of the auction compared with the traditional auction scheme.

Key words: V2G technology, consortium?blockchain, V2V energy transaction, secondary double auction mechanism

摘要： 车辆到电网（vehicle-to-grid，V2G）技术是能源互联网中一项高度新兴的技术，用于合理利用可再生能源而被广泛研究。然而，由于V2G网络的集中化管理和通信的开放性，V2G网络存在单点故障、隐私泄露、分布式能源的不平衡调度等问题。针对上述问题，提出了一个基于联盟区块链的本地化的车辆与车辆之间（vehicle to vehicle，V2V）的能源交易系统模型。此外，考虑到电动汽车之间价格和电力需求匹配，提出了一种新的二次双重拍卖机制，以匹配交易车辆对和决定最终交易定价，并使交易双方收益相等。通过安全性分析表明，区块链网络提高了V2V能源交易的安全性。基于数值结果表明，提出的二次双重拍卖机制提高了交易双方收益且收益相等，并与传统拍卖方案相比，提高了拍卖成功率。

关键词: V2G技术, 联盟区块链, V2V能源交易, 二次双重拍卖机制